/*!	 valuenode_step.h
**	 Header file for implementation of the "Step" valuenode conversion.
**
**	Copyright (c) 2008 Chris Moore
**  Copyright (c) 2011 Carlos López
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifndef __SYNFIG_VALUENODE_INTERPOLATION_STEP_H
#define __SYNFIG_VALUENODE_INTERPOLATION_STEP_H

#include <synfig/valuenode.h>

namespace synfig
{

class ValueNode_Step : public LinkableValueNode
{
    ValueNode::RHandle link_;
    ValueNode::RHandle duration_;
    ValueNode::RHandle start_time_;
    ValueNode::RHandle intersection_;

    ValueNode_Step(const ValueBase &value);

public:

    typedef etl::handle<ValueNode_Step> Handle;
    typedef etl::handle<const ValueNode_Step> ConstHandle;

    virtual ValueBase operator()(Time t)const;

    virtual ~ValueNode_Step();

    virtual String get_name()const;
    virtual String get_local_name()const;

    virtual ValueNode::LooseHandle get_link_vfunc(int i)const;

protected:
    LinkableValueNode* create_new()const;
    virtual bool set_link_vfunc(int i, ValueNode::Handle x);

public:
    using synfig::LinkableValueNode::get_link_vfunc;

    using synfig::LinkableValueNode::set_link_vfunc;
    static bool check_type(Type &type);
    static ValueNode_Step* create(const ValueBase &x);
    virtual Vocab get_children_vocab_vfunc()const;
}; // END of class ValueNode_Step

}; // END of namespace synfig

#endif